Images: David Mow

"Posting has gotten so painfully hard but please know to everyone we appreciate your support and words of encouragement," one post reads. "Our silence does not mean we have stopped the search, we are still determined.

According to a website set up by family and friends, the text sent to his fiancee was the last time anyone heard from Mow .

"David is known by all of us as a cell phone loving kind of guy. He is texting and talking with his fiance and daughter around the clock," according to the website. "David did not reply to his fiance's text message and did not answer his phone."

Family members say the 56-year-old may need medical attention and suffers from memory loss.

His cell phone is dead and his car is gone, according to friends. San Diego police have issued a missing persons alert which describes Mow as Asian but looks Hispanic or resembles a Pacific Islander. He is 5'11", weighs 250 lbs, has black hair and brown eyes.

He works as an independent contractor on home renovations and is known to visit casinos.

Mow drives a 2005 Silver Envoy. The license plate is CA 5LVJ595.

If you have any information about Mow, or if you see him, please call the San Diego Police Department at 619-531-2000.